JavaScript Interview Notes 🚀

A structured and continuously evolving repository for JavaScript interview preparation, focused on fundamentals, clarity, and real-world understanding.

This repo is built as a personal knowledge base and quick revision guide for frontend and full-stack interviews.

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🎯 Purpose of This Repository

• Build strong JavaScript fundamentals
• Prepare for technical interviews systematically
• Maintain clean, concise, and revisable notes
• Practice writing readable documentation
• Showcase disciplined learning on GitHub

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🗂️ Repository Structure

The repository is organized by concepts, with interview questions at two levels:

1️⃣ Topic-wise Notes

Each folder contains:

• Concept explanations
• Code examples
• Common pitfalls
• Real-world use cases

2️⃣ Interview Questions (Two Levels)

• Folder-level questions → Contextual, topic-specific
• Compiled interview-questions folder → Fast revision before interviews

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📚 Topics Covered

📌 Core JavaScript

📂 core-js/

• Execution Context
• Hoisting
• Scope & Lexical Environment
• Closures
• this keyword
• Interview Questions

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📌 Functions & Objects

📂 functions-and-objects/

• Function types
• call / apply / bind
• Prototypes
• Shallow vs Deep Copy
• Interview Questions

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📌 Async JavaScript

📂 async-javascript/

• Event Loop
• Promises
• async / await
• Promise APIs
• Interview Questions

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📌 Arrays & Practical JavaScript

📂 arrays-and-practical-js/

• map / filter / reduce
• Debounce & Throttle
• Immutability
• Interview Questions

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📌 Polyfills

📂 polyfills/

• Array.prototype.map
• Function.prototype.bind
• debounce

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📌 Compiled Interview Questions

📂 interview-questions/

• Core JavaScript
• Async JavaScript
• Functions & Objects
• Arrays
• Mixed / Tricky Questions

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🧠 Note Format

Each concept note generally includes:

• Definition
• Why the concept exists
• Code examples
• Output / explanation
• Common interview questions
• Edge cases & pitfalls
• Real-world usage

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🛠️ How to Use This Repo

1. Pick a topic folder
2. Read the concept notes
3. Run code examples locally
4. Review interview questions
5. Use the compiled interview-questions folder for quick revision

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📈 Status

🚧 Actively maintained and updated as I revise and learn more.

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👤 Author

Rohan
JavaScript | Frontend / Full-Stack Interview Preparation

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